Here an expert communications technician puts
new batteries in one of the Frogmen's tiny walkie-talkies. These
small units are important for keeping in contact with the main party,
one another, or the launching craft standing out to sea waiting to
pick them up after the project has been completed. These small radios
are towed right along with the men as they swim through the depths on
their missions. They are carried in water-tight containers so that
when ready for use they are dry and ready to make contact. These
small two-way radios are light in weight and have a range of several
miles, particularly over water, where there are no obstructions to
deflect the transmission waves.